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Switch with BJT or MOSFET in a R/C car project

Discussion in 'General Electronics Discussion' started by lefam, Mar 11, 2011.

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  1. lefam

    lefam

    43
    0
    Nov 18, 2010
    Hi,

    I am working in a R/C car project that consists in hacking the car's remote control to control it with a cellphone. I am using an arduino duemilanove board (with atmega328 MCU).
    The idea is to send commands to the remote control using the arduino. In fact, what the arduino should do is close some switches in the remote control.

    I am in doubt if I should switch using a BJT transistor or a MOSFET one.

    I have seen on a website that the BJTs are better for amplifying, while the MOSFETs are good in switching.
    Does it matter using one instead of the other? Or doesnt it matter?

    Thank you!!!
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,473
    2,819
    Jan 21, 2010
    For small signal use (i.e. low current, low voltage) either will probably work.

    BJT may have the advantage of not being static sensitive.
     
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